Rotary drill arrangement

Details Rotary drill arrangement Rotary drill arrangement

1997-08-01

2000-02-22

Dang, Hoang

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175353, 175365, 175385, 175426, E21B 1014, E21B 1028, E21B 1046

Patent

active

060269162

ABSTRACT:
A rotary drill arrangement comprising a combination spade drill body having a rotational axis, a shank portion, and a generally planar spade cutter portion with a pair of oppositely directed cutting edges extending radially of the axis, and a rotatable frusto conical cutter mounted on the spade cutter portion adjacent the maximum radial extent of each cutting edge.

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Leonard A Briese--Jul. 1996 "Harts Petroleum Engineer International", Disc Cutter Bits Offer Potential Penetration Rates, p. 11.

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